I'd say find the items within your writing--the passages and turns of phrase and characterizations--that feel uniquely your own, and play those up throughout the story.
Another possibility is to identify why your character feels like Hermione and Katniss. I assume you wrote a girl who is very bookish and good with a weapon? If this is the case, add another minor character better with that weapon, or another minor character better with books. Something like this. Katniss is "the best" with a bow and Hermione is "the smartest" in her class.
But your hero doesn't need to be. She can be bookish, sure, so is Violet (and Klaus) from Lemony Snicket. But she doesn't have to be the smartest, and certainly not the best with a weapon. You can have other characters that outshine her in any particular category.
The combination of smart and good-with-a-weapon should lead to some details that are neither like Hermione nor Katniss.
And lastly, I think as you work more and more with your characters, you will see more and more of their individuality. It may simply be that you are using templates and have not yet developed your story and world to the point at which it stands on your own. If that rings true, then simply keep at it. Work back through your novel. Ask what the character motivations are for your heroes, how those motivations will manifest in unique ways. Keep at it.